CAPACITY IMPROVEMENT IN OFDMA SYSTEM USING RELAYING

摘要

In a Wireless Communications System, a communication network comprises at least a first region serviced by a base station. This region also comprises a plurality of bridging stations deployed around the base station, so defining a circumference around it. Each bridging station comprises one or more directional antennas operable to generate a coverage area lying predominantly outside the circumference. The effect is to form, in operation, an outer zone predominantly outside the circumference serviced by the bridging stations, and an inner zone within the circumference serviced by the base station. For communications with the outer zone, the base station is operable to assign duplicate OFDMA sub-channels to mobile stations in respective areas of the outer zone served by bridging stations that experience sufficiently low levels of cross-interference from each other's communications.